Will getting a new mobo fix my problem?

Hello,
The motherboard im currently using is a Cupertino 2 (hp mobo). The problem is I get no display out of my new gpu(hd7770). I've upgraded my psu(gs600) and also tried out another 2 gpus (hd5450 and hd7790).

The hd5450 boots and displays.

The hd7770 boots but dosent display.

The hd7790 does not boot nor display.

Any help?
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